CompTIA A+
Question 21
Question
What Windows app in Windows 10 combines many utilities into a unified tool?
A. Settings
B. Control
C. Command Center
D. Control Center
Answer
A. Settings
Explanation
The Settings app in Windows 10 offers many utilities in a unified interface.
Question 22
Question
Which CPU feature enables the microprocessor to support running multiple operating systems at the same time?
A. Clock multiplying
B. Caching
C. Pipelining
D. Virtualization support
Answer
D. Virtualization support
Explanation
Intel and AMD CPUs come with virtualization support, enabling more efficient implementation of virtual machines.
Question 23
Question
Silas has an AMD-based motherboard with two sticks of DDR3 RAM installed in two of the three RAM slots, for a total of 8 GB of system memory. When he runs CPU-Z to test the system, he notices that the software claims he’s running single-channel memory. What could be the problem? (Select the best answer.)
A. His motherboard only supports single-channel memory.
B. His motherboard only supports dual-channel memory with DDR2 RAM, not DDR3.
C. He needs to install a third RAM stick to enable dual-channel memory.
D. He needs to move one of the installed sticks to a different slot to activate dual-channel memory.
Answer
D. He needs to move one of the installed sticks to a different slot to activate dual-channel memory.
Explanation
Motherboards can be tricky and require you to install RAM in the proper slots to enable dual-channel memory access. In this case, Silas should move one of the installed sticks to a different slot to activate dual-channel memory. (And he should check the motherboard manual for the proper slots.)
Question 24
Question
Which of the following most accurately describes the relationship between BIOS and hardware?
A. All hardware needs BIOS.
B. All hardware that attaches to the motherboard via ribbon cables needs BIOS.
C. All hardware built into the motherboard needs BIOS.
D. Some hardware devices need BIOS.
Answer
A. All hardware needs BIOS.
Question 25
Question
Solon has a very buggy computer that keeps locking up at odd moments and rebooting spontaneously. He suspects the motherboard. How should he test it?
A. Check settings and verify good components.
B. Verify good components and document all testing.
C. Replace the motherboard first to see if the problems disappear.
D. Check settings, verify good components, replace components and document all testing.
Answer
D. Check settings, verify good components, replace components and document all testing.
Explanation
Solon needs to check settings, verify good components, replace components, and document all testing.
Question 26
Question
A PC’s power supply provides DC power in what standard configuration?
A. Two primary voltage rails, 12 volts and 5 volts, and an auxiliary 3.3-volt connector
B. Three primary voltage rails, one each for 12-volt, 5-volt, and 3.3-volt connectors
C. One primary DC voltage rail for 12-volt, 5-volt and 3.3-volt connectors
D. One voltage rail with a 12-volt connector for the motherboard, a second voltage rail with a 12-volt connector for the CPU, and a third voltage rail for the 5-volt and 3.3-volt connectors
Answer
B. Three primary voltage rails, one each for 12-volt, 5-volt, and 3.3-volt connectors
Explanation
The standard PC power supply configuration has three primary voltage rails, one each for 12-volt, 5-volt, and 3.3-volt connectors.
Question 27
Question
Which SATA version offers the least overhead (and thus best performance)?
A. AHCI
B. SATA 2.0
C. PATA 3.0
D. SATAe
Answer
D. SATAe
Explanation
SATA Express (SATAe) uses the PCIe bus and has none of the traditional SATA overhead.
Question 28
Question
Which of the following correctly identifies the four possible entries in a file allocation table?
A. File name, date, time, size
B. Number of the starting cluster, number of the ending cluster, number of used clusters, number of available clusters
C. An end-of-file marker, a bad-block marker, code indicating the cluster is available, the number of the cluster where the next part of the file is stored
D. File name, folder location, starting cluster number, ending cluster number
Answer
C. An end-of-file marker, a bad-block marker, code indicating the cluster is available, the number of the cluster where the next part of the file is stored
Explanation
The four possible entries in a file allocation table are an end-of-file marker, a bad-block marker, code indicating the cluster is available, and the number of the cluster where the next part of the file is stored.
Question 29
Question
You’ve just replaced Jane’s Windows 7 PC with a new Windows 10 machine. What post-installation tool should you run to make the transition as painless as possible for her?
A. Windows Activation
B. Repair installation
C. Windows Easy Transfer
D. User State Migration Tool
Answer
C. Windows Easy Transfer
Explanation
Run the Windows Easy Transfer tool to move all her Windows 7 personal files and familiar settings, like her desktop, to the new Windows 10 computer.
Question 30
Question
Which of the following root keys contains the data for a system’s non-user-specific configurations?
A. HKEY_LOCAL_MACHINE
B. HKEY_USERS
C. HKEY_CURRENT_USER
D. HKEY_CLASSES_ROOT
Answer
A. HKEY_LOCAL_MACHINE
Explanation
The system’s non-user-specific configurations are stored in the HKEY_ LOCAL_MACHINE root key of the registry.
